Phosphorodithioic acid S-[1-(methoxycarbonyl)ethyl]O,O-diethyl ester, also known as ethion, is an organophosphorus compound widely used as an insecticide and acaricide. It is a colorless to pale yellow liquid with a chemical formula of C11H21O4PS2. Ethion is effective against a broad spectrum of pests, including aphids, mites, and whiteflies, and is commonly applied in agriculture to protect crops such as cotton, fruits, and vegetables. The mode of action involves inhibiting acetylcholinesterase, an enzyme essential for the proper functioning of the nervous system in insects, leading to their paralysis and death. Due to its potential health and environmental risks, ethion is subject to strict regulations and is being phased out in some countries.
The CAS Registry Mumber 919-38-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,1 and 9 respectively; the second part has 2 digits, 3 and 8 respectively. Calculate Digit Verification of CAS Registry Number 919-38: (5*9)+(4*1)+(3*9)+(2*3)+(1*8)=90 90 % 10 = 0 So 919-38-0 is a valid CAS Registry Number.